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Simple calculation is a special kind of calculation, which uses the laws of operation and the basic properties of numbers, so as to make the calculation easy, so that a very complex formula becomes easy to calculate the number.
1. Addition commutative law: the position of two numbers is added and the sum is unchanged.
2. Addition associative law: add three numbers, first add the first two numbers, or add the last two numbers first, and then add with the third number, and the sum is unchanged.
3. Multiplicative commutative law: when two numbers are multiplied, the position and product of the exchange factor remain unchanged.
4. Multiplication and associative law: multiply three numbers, multiply the first two numbers, or multiply the last two numbers first, and then multiply with the third number, and their product remains unchanged.
5. Multiplicative distributive law: multiply two numbers by the same number, you can multiply the two additive numbers with this number respectively, and then add the two products, and the result remains the same. For example: (2+4) 5 2 5+4 56,
Nature of division: In division, the dividend and the divisor expand (or shrink) by the same multiple at the same time, and the quotient does not change. o divided by any number that is not o gives o.
Simple multiplication: multiplication of the multiplier, the multiplier at the end of the o, you can first multiply the front of the o, zero does not participate in the operation, a few zeros are falling, added at the end of the product.
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The easy way to do this problem is to subtract the last two numbers and add the first number.
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Solution: 432-535+235 is equal to (132) and the known demand is equal to 432-535+235.
x - y - z = x - y + z) Answer: 432-535 + 235 equals 132
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Hello, the easy way to ask this question is:
The original formula = 452 + 44-156 = 496-156 = 340, so the result is equal to 340.
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Using the addition method combined with the law of the source, the whole value can be reduced to a multiple of 10 or 5 as much as possible, which can simplify the operation of the silver pose.
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The process of the simple calculation method is:
Qi Hui Lu (2035-235) - (568 432).
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The simple calculation process is as follows:
1. Extract the original formula: 2035-568-235-4322, calculation process:
Hui Xiangbi =1800-1000
3. Banquet shouting calculation result: 800
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Remove parentheses, change the order of operations, and perform simple calculations.
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The simple calculation process is as follows, and the observation data shows that 435 and 235 can be rounded, so the original formula = (435-235) + 120 = 200 + 120 = 320
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As for the back is + or -
If it is +, it is 200 + 120 = 320
If yes - that's 200-120 = 80
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The meaning of the title is not very clear, if it is.
If yes, 435-235+120
The above is just for your reference
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According to the equation 435-235120, this is a subtraction calculation, and it can also be seen as a positive number and a negative number, the result of the two numbers +435 and -235120. Think of +435 as (500-65), and the formula 435-235120 500-65-235120 500-235185 -234685
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435 235 200 is placed there, and the difference minus is the whole number 200, followed by +120 or minus 120? The result is 320 or 80
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Is there an operator between 235 and 120? If it is "+".
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Because there are two numbers of 253 and 253 in this question, this can be eliminated directly. It is to change 4253 to 4000+253.
The result is 4000+253-258-253
Two of them 253 removed.
The result was 4000-258
Hopefully, hopefully it can help you.
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Solution: Original formula = 325-125+418
I hope the world code can help you, and I hope thank you! Tease.
Math Easy Calculation Method:
1. Simple calculation using the multiplicative distributive law. >>>More
The common factor in this problem is "57", so the original formula = 57x101-57x1 = 57x(101-1) = 57x100 = 5700
Hello, see the following ** question process:
36 111 + 888 8 simple operation: =36 111 + 111x8x8 = 111x (36 + 64) = 111x100 = 11100. >>>More
Solution analysis: rounding, according to the four rules of operation for the operation, the same level of operation is calculated in order, and the different levels of operation are calculated first, so the result can be obtained quickly.